The aim of the present study was the assessment of the ability of chicken lymphocytes to form the Radial Segmentation (RS) of nuclei, as well as the evaluation of the acid phosphatase activity. The lymphatic system of chickens was altered through surgical removal of lymphatic organs and lymphocytes function was stimulated by using selected antigens. The examination was carried out on the blood obtained from bursectomized, thymectomized and splenectomized 7-week-old chickens, stimulated with LPS or SRBC. The spontaneous and induced RS was evaluated and the cytochemical measurement of Fk was performed in the blood lymphocytes. It was shown that the ability to form RS and Fk activity in lymphocytes are dependent on functional defects and disturbances in cooperation of these cells which in turn are the result of disabled interaction of the lymphatic organs and defective condition of immune system at the time of immunization.

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